Dental articulator



(No Model.)

0. F, GARRETSON. DENTAL ARTIOULATOR.

No. 497,122. Patented May 9, 1893.

UNITED STATES PATENT OFFICE.

CHARLES F. GARRETSON, OF KNOXVILLE, IOWA.

DENTAL ARTICULATOR.

SPECIFICATION forming part of Letters Patent No. 497,122, dated May 9,1893. Application filed January 26, 1893. Serial No. 459,858. (Nomodel.)

To all whom it may concern.-

Be it known that I, CHARLEs F. GARBETSON, a citizen of the UnitedStates, residing at Knoxville,in the county of Marion and State of Iowa,have invented certain new and useful Improvements in Dental Apparatusfor Obtaining the Bite; and I do hereby declare that the following is afull, clear, and exact description of the same, reference being had tothe annexed drawings, making a part of this specification, and to theletters of reference marked thereon.

The present invention has for its object to provide a simple andeffective device or apparatus designed for use in dentistry in obtainingwhat is professionally termed in the art as the bite so that the sets ofteeth when completed and in use, will meet each other properly when thelower jaw is closed. In order to attain this purpose, it is necessary toprevent the lowerjaw from being projected forward out of its naturalposition while taking impression plates for the teeth, and to this endthe invention consists in a de vice constructed substantially as shownin the drawings and hereinafter described and claimed.

Figure 1 of the drawings is a perspective view of my improved device orapparatus; Fig. 2 a detail view showing a modification thereof.

In the accompanying drawings A represents suitable spring-arms whichmaybe constructed of steel or other spring metal, or a material thatwill possess the required elasticity or springy nature may be used withthe same object in view. The arms may be made from a single piece ofmaterial or may be formed separate as found most desirable.

To the arms A is adjustably connected a suitable chin-pad B by means ofa notched or toothed bar a which passes through a slot and is held inits adjusted position by means of a suitable pawl b engaging with theteeth on the bar, or by any other means found best adapted to thepurpose.

I do not wish to be understood as confining myself to any special formof chin-pad or the means shown for holding the same in its adjustedposition, as any device that will form a pad for the chin for asimilarpurpose would attain the end desired, andIreserve the right to make anysuch changes in the construction of the device or modifications, aswould be considered as coming within the scope of rubber, or any othersuitable material found best adapted to the purpose. After the apparatusor device is connected to the head by the tips entering the ears, thechin-pad is adjusted so as to hold the lower jaw to its natural positionand then held stationary by the pawl or other means employed for thepurpose.

In place of making the chin-pad adjustable, the arms A may beconstructed so as to be extensible as shown in Fig. 2. To attain thisend, one of many well known means is employed, in the present instance,the extremity of the arms being formed round in place of flat, as inFig. 1, and fitting over it is a tubular extension or section 0 which isheldin its adjusted or extended position by means of a set screw dpassing through a slot in the section. Any means may be employed forrendering the arms extensible, as the means shown is one of many formsthat may be used.

Having now fully described my invention, what I claim as new, and desireto secure by 'Letters Patent, is-

1. A dental apparatus or device for obtaining the bite, consisting ofsuitable springarms for the head and a pad for supporting the chin,substantially as and for the purpose set forth.

2. A dental apparatus or device for obtaining the bite, consisting ofsuitable arms for the head having ear-tips, and a pad for the chin,substantially as and for the purpose described.

3. A dental apparatus or device for obtaining the bite, consisting ofextensible arms for the head and a pad for supporting the chin,substantially as and for the purpose specified.

In testimony that I claim the aboveI have hereunto subscribed my name inthe presence of two witnesses.

CHARLES F. GARRETSON.

Witnesses G. K. HART, J. RooKAnnLLoW.

